Epidemiology, Biochemistry and Evolution of Trypanosoma cruzi Lineages Based on Ribosomal RNA Sequences
|
|
- Merryl Lawson
- 5 years ago
- Views:
Transcription
1 Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 94, Suppl. I: 59-64, Epidemiology, Biochemistry and Evolution of Trypanosoma cruzi Lineages Based on Ribosomal RNA Sequences Bianca Zingales/ +, Beatriz S Stolf, Ricardo P Souto/ ++, Octavio Fernandes*, Marcelo RS Briones** Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, Caixa Postal 6077, São Paulo, SP, Brasil *Departamento de Medicina Tropical, Instituto Oswaldo Cruz, Rio de Janeiro, RJ, Brasil **Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brasil Key words: Trypanosoma cruzi - major lineages - ribosomal RNA - molecular epidemiology - phylogeny A puzzle in Chagas disease research has been to correlate molecular markers with epidemiology since isolates of Trypanosoma cruzi exhibit a broad host range, induce distinct clinical presentations in patients and show great diversity in biological and biochemical characteristics. Early studies on population genetics revealed substantial isozymic variability among isolates of T. cruzi defining three major groups or zymodemes named Z, Z and Z3 (Miles et al. 978, 980). Further analysis of 5 gene loci disclosed a greater heterogeneity determining the distribution of T. cruzi isolates into 43 zymodemes that could not be grouped by the authors in few natural clusters (Tibayrenc & Ayala 988). The main conclusion of these studies was that the population structure of this parasite is clonal rather than sexual, and, as a consequence, the present genetic and biological variability of T. cruzi is resultant from the independent evolution of clonal lines (Tibayrenc & Ayala 988). Acceptance of clonal propagation of T. cruzi implies that the classical definition of species is not fully adequate to this parasite. It has been proposed that each distinct genotype should be studied individually and special attention given to the most represented ones (Tibayrenc 995). On the other hand, other groups still believe that it is worth searching for genetically and ecologically coherent group- This work was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (Fapesp) and Conselho Nacional de Pesquisa (CNPq). + Corresponding author. Fax: bszodnas@quim.iq.usp.br ++ Present address: Department of Biochemistry, Boston University School of Medicine, 80 East Concord St., Boston, MA 08, USA Received 9 June 999 Accepted 9 August 999 ing of isolates (Macedo & Pena 998). Indeed the remarkable genetic diversity of T. cruzi (Morel et al. 980, Henriksson et al. 990, Macedo et al. 99) initially identified could be somewhat organized (Henriksson et al. 993, Tibayrenc 995). However, analyses of these fast evolving genetic markers could not clearly show defined clusters. TYPING OF T. CRUZI ISOLATES BASED ON A RRNA SEQUENCE In contrast to the diversity suggested by former approaches, analyses of markers with lower evolutionary rate such as multigenic families suggested dichotomy within T. cruzi isolates. PCR amplification of a sequence from the D7 divergent domain of the 4Sa rrna (LSU) gene indicated dimorphism among T. cruzi isolates and allowed the division of 6 parasite stocks into two groups (Souto & Zingales 993). This observation was confirmed by others following riboprinting analysis in 8 isolates from North America (Clark & Pung 994). Subsequently, a variable spot in the spacer region of the mini-exon gene was found in strains of T. cruzi which also showed dimorphism after PCR amplification (Souto et al. 996). The typing approaches based on rrna and mini-exon sequences were used to analyse 88 T. cruzi stocks from s, insects and sylvatic animals from several Latin America countries. Amplification of these sequences originated 5 or 0bp products for rdna and 300 or 350bp products for the mini-exon. Within individual isolates, one of the three associations was observed: the 5bp rdna product with the 300bp mini-exon product (defined as group ), the 0bp rdna product with the 350bp mini-exon product (defined as group ), and the presence of both rdna amplification products with the mini-exon group product (defined as group /) (Fig. ) (Souto et al. 996). RAPD analysis showed variability between individual isolates, however, tree analysis clearly indicated the presence of two major
2 60 T. cruzi Lineages Based on Ribosomal RNA Sequence Bianca Zingales et al. branches. Interestingly, the group isolates correlated precisely with one branch of the tree, and group and group / isolates correlated with the other branch (Fig. ) (Souto et al. 996). Our studies clearly indicate that T. cruzi isolates can be partitioned into two major Lineages, which we named Lineage and (Fig. ) (Souto et al. 996). In that study several isolates classified as Z and Z were analyzed and it was concluded that Z stocks belong to Lineage, while stocks classified as Z fall into Lineage. The position of Z3 was further investigated based on mini-exon sequence analysis and it was concluded that it constitutes a discrete sub Lineage within Lineage (Fernandes et al. 998a). This observation agrees with previous conclusions indicating that Z3 although distinct from, is related to Z (Miles et al. 980). The existence of these lineages can be noticed by detailed isoenzyme data (Tibayrenc 995). Concerning the major clones defined by Tibayrenc and Ayala (988), our typing assays indicate that clones 9/0 belong to Lineage, while clones 3 and 39 belong to Lineage. It should be pointed out that clone 39 maintains heterozygosity at several loci and is classified as group / (Souto et al. 996). More recently, the bi-polar grouping of T. cruzi has been supported by riboprinting analysis (Stothard et al. 998), rrna and mini-exon (spliced-leader) promoter sequences and activities (Floeter-Winter et al. 997, Nunes et al. 997a, b), microsatellite markers (Oliveira et al. 998) and structure of ribosomal spacers (Fernandes et al. 999a). Presently, several laboratories are involved in the definition of the relevance of the two lineages and their sub-groups with respect to the epidemiological and biological properties of T. cruzi. These studies as well as the analysis of the evolutionary origin of the two Lineages should indicate whether each Lineage constitutes, according to the modern concept of species, an ecological and a genetic unit (Macedo & Pena 998). THE RIBOSOMAL RNA CISTRON Southern blot analysis (Souto et al. 996), riboprinting (Clark & Pung 994, Stothard et al. 998) and restriction profiles of internal transcribed spacers (ITS) from the rdna cistron (Fernandes et al. 999a) clearly indicate that the overall structure of the ribosomal RNA cistron differs between isolates of Lineage and Lineage, supporting this division. It has also been shown that group / isolates have both types of rrna cistrons, with eight to ten-fold greater copy number of group - rdna genes relative to group -rdna genes (Souto et al. 996). Previous studies in different organisms have shown that rrna gene promoters exhibit speciesspecific control (Sollner-Webb & Towers 986). A plasmid construct bearing the promoter sequence from the rrna cistron of the CL strain drove the expression of chloramphenicol acetyl transferase (CAT) when transfected into epimastigotes of some T. cruzi strains, but surprisingly, was inactive in others (Tyler-Cross et al. 995). We examined the activity of the same construction in isolates belonging to the two major phylogenetic lineages. It was observed that CL strain (Lineage ) rrna promoter drove high CAT activity in Lineage isolates, but essentially no activity in Lineage strains. Thus, the CL rrna promoter exhibited a clear Lineage -specificity (Floeter-Winter et al. 997, Nunes et al. 997a). In order to analyse the activity of Lineage rrna promoter, we cloned the corresponding segment from the Dm8 strain. Alignment of this sequence (800bp) with rrna promoters from other strains of T. cruzi indicated 98% and 8% identity with sequences of Lineage and Lineage strains, respectively (Floeter-Winter et al. 997, Stolf 999). These data indicate that the sequence homology in this region also reflects the division into two lineages. We have also analysed the rrna promoter sequences from group / isolates, which contains two types of ribosomal RNA cistrons. It was observed that the type promoter sequence of NR cl3 clone (group /) has 96% identity with that of CL Brener clone (Lineage, group ) and 80% identity with that of Dm8 strain (Lineage, group ). On the other hand, the type promoter sequence of NR cl3 clone has 8% identity with that of CL Brener clone and 90% identity with that of Dm8 strain (Stolf 999). The activity of Lineage and Lineage promoters was investigated by transient expression of CAT reporter gene in different T. cruzi isolates typed as rdna group, group and group / (cf in Fig. ). It was observed that Lineage promoter is expressed in both group and group / strains, but shows no activity in group isolates. On the other hand, Lineage promoter is expressed in the three groups of isolates (Nunes et al. 997a, Stolf 999). In the specific case of group / it was observed that the expression of CAT driven by L promoter was higher than that driven by the L promoter. Interestingly, RT-PCR experiments conducted with total RNA extracted from group / isolates allowed to conclude that only the rrna cistron of type is transcribed in vivo (Stolf 999). Taken together, our data indicate that there are clear differences in the sequence and activity of the rrna promoter regions in the representatives of the two major lineages. The specificity of the promoter activity is not mutually exclusive, since group and group / strains express promoters
3 Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 94, Suppl. I, LINEAGE CL B67 CA B47 SC43 cl Bug NR cl3 SO3 cl5 E sm e r. Y Basileu A ME rdna HOST / / / / / / / LINEAGE G Dm8 Tulahuen Silvio YuYu opossum opossum opossum Fig. : UPGMA tree based on the proportion of bands not shared among the isolates. For each isolate the corresponding rdna and mini-exon groups as well as the host from which it was derived are indicated (after Souto et al. 996). from both groups, but group strains only express group promoters. The reasons for these observations are unclear but might be related to the characteristics of the components of the transcription machinery in the T. cruzi groups. Nevertheless, since it has previously been shown for many eukaryotes that the rrna promoter activity is species-selective (Sollner-Web & Towers 986) the observation that T. cruzi rrna promoters show group-specificities supports the conclusion that these groups could be considered discrete taxa. EPIDEMIOLOGICAL DISTRIBUTION We have analysed by the 4Sa rrna and/or mini-exon typing methods more than 00 isolates from triatomine species and mammalian hosts from the domestic and sylvatic cycles originating from Brazilian states. Data provide evidence for a strong association of T. cruzi Lineage with the domestic cycle, while Lineage is preferentially encountered in the sylvatic cycle (Fernandes et al. 998b, 999b, Zingales et al. 998, cf also Fig. ). Data also suggest that Lineage has properties that favour infections, possibly due to higher parasitemia, since all parasites isolated from seropositive individuals from endemic regions belong to this Lineage (Fernandes et al. 998b, Zingales et al. 998). On the other hand, Lineage was isolated from very few seropositive cases in Amazonas where T. cruzi is enzootic (Zingales et al. 998). These observations concerning the general behaviour of the two lineages in chagasic patients in Brazil agree with data regarding the distribution of two major clones: 0 (Lineage ) and 39 (Lineage ) in children and vectors from a Bolivian endemic area (Breniere et al. 998). It was concluded that clone 39 is prevalent in patients, while in vectors (Triatoma infestans) clones 0 and 39 are found with comparable frequencies. These results suggest a limited selection in the transmission of the two clones and a drastic control of clone 0 parasitemia by the immune system of children patients. Analysis of 68 T. cruzi stocks from mammals and triatomines of the Atlantic Coast rainforest in the State of Rio de Janeiro suggests a preferential adaptation of Lineage to primates and Lineage to opossums (Fernandes et al. 999b), as has also been concluded from studies conducted in Georgia State (USA) (Clark & Pung 994, Pung et al. 998).
4 6 T. cruzi Lineages Based on Ribosomal RNA Sequence Bianca Zingales et al. BIOLOGICAL EVIDENCE Several biological evidence also support the conclusion that the two phylogenetic lineages have different characteristics. Experimental infection of marsupials with strains of Lineages and indicates the elimination of type strain from the host, while the type strain promotes a permanent and very mild infection (Carreira et al. 996). In vivo and in vitro experiments suggest that the two lineages differ markedly in infectivity to mammals. In fact, it has been shown that two T. cruzi strains Y and CL (Lineage ) are highly infective to mice, while strain G (Lineage ) does not produce parasitemia (Yoshida 983). This observation agrees with data derived from the analysis of isolates from chagasic patients (Fernandes et al. 998b, Zingales et al. 998). It has also been reported that Lineage strains are four times more infective to HeLa cells than Lineage strains. These results have been correlated with the expression of glycoprotein gp90 which seems to inhibit calcium mobilization required for cell invasion and is present in the eight analyzed strains of Lineage but not in Lineage isolates (Ruiz et al. 998). Regarding the parasite-triatomine vectors interaction, it is known that growth and metacyclogenesis of different T. cruzi isolates in the insect depend on the strain of the parasite (Garcia & Azambuja 99, Lana et al. 998). For example, it has been shown that infection of Dipetalogaster maximus with two different clones of T. cruzi showed that only one clone underwent metacyclogenesis. Similar results were seen when different strains and clones of T. cruzi infected Rhodnius prolixus. It was also observed that clone Dm8c (Lineage ) was two to three orders of magnitude more resistant to a lytic agent purified from the crop of R. prolixus than the Y strain (Lineage ). Resistence to lytic activity, as well as reactivity to specific lectins found in the digestive tract of triatomines may provide selective advantages for the development of certain strains of T. cruzi over other strains (cf. Garcia & Azambuja 99). EVOLUTION OF T. CRUZI LINEAGES Comparative sequence analysis of the variable region D7 within the LSU rrna was used to check whether the divergence between T. cruzi Lineages and occurred before the divergence of the extant strains as suggested by RAPD (Souto et al. 996) and also to verify whether the lineages are truly monophyletic. Therefore, sequences of the D7 region were determined for T. rangeli and 4 strains of T. cruzi and aligned. This alignment was used to build maximum likelihood trees using different transition models and rooted by outgroup (T. rangeli). The tree presented suggests that the divergence between T. cruzi Lineages and occurred before the divergence of the extant strains and separate T. cruzi into two groups in 00% of bootstrap replicates (Fig. ). Also a third group seems to be present which corresponds to group /, where the presence of two types of rdna cistrons has been shown. Alignment of the sequence of type D7 region of SO3 (group /) places this isolate among Lineage strains (Fig. ) while type D7 sequence does not allow the establishment of a clear position in the tree. In fact, depending on the algorithm parameters used (parsimony, different models of maximum likelihood and gamma distribution), group / in some trees seems to be more related to Lineage and in other trees to Lineage. Sequence comparisons of small subunit rdna (SSU) and faster evolving genes will probably help to determine whether group / is more closely related to Lineage or or if it really is a third lineage of strains. T. rangeli Fig. : phylogeny of several Trypanosoma cruzi isolates based on D7 region of the LSU rdna. T. rangeli was used as an outgroup. The scale bar indicates the number of substitutions per sequence position and the number 00 above the node dividing Lineages and indicates that this topology was supported by 00% bootstrap replicates. This tree inferred by Maximum likelihood has the same topology observed when Parsimony methods were applied but differs from Neighbor Joining trees. In most reconstructions the clade representing group / could not be resolved. (Bas, Basileu strain; Tul, Tulahuen strain). Phylogenetic reconstructions using the SSU gene indicate that divergence between the two T. cruzi lineages is greater than the distances separating four species of Leishmania and comparable to distances among trypanosomatid genera Crithidia, Leishmania, Endotrypanum and Leptomonas (Briones et al. 999). Using patristic distances (sum of branch lengths) of the maximum likelihood tree and the evolutionary rates of 0.85% sequence divergence/00 million years and % sequence divergence/00 million years (Escalante & Ayala 995) we estimated the divergence time of the two lineages to be 88 to 37 million years, respectively.
5 Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 94, Suppl. I, Because the rate of % sequence divergence/00 million years for the SSU rdna might reflect the evolution of faster evoling segments of the molecule we believe that 88 million years of sequence divergence more likely reflects an average rate for the entire gene (Briones et al. 999). CONCLUDING REMARKS Evidence supporting the existence of two major phylogenetic lineages in T. cruzi is accumulating from independent genomic markers, DNA sequence comparison, population genetics and promoter activity from multigenic families. Data indicate that these lineages are distinct evolutionary units. In addition, epidemiological and biological studies suggest that these lineages have different characteristics. Therefore, the division of T. cruzi into two major groups is evident not only genotypically but also physiologically. It is time for the re-evaluation of the T. cruzi taxon and to work out a common nomenclature for these lineages that will serve not only taxonomists but the general community of researchers working with T. cruzi. Further genetic characterization of the subgroups within these lineages is a fundamental step towards the understanding of the complex epidemiological and clinical manifestations of Chagas disease. REFERENCES Brenière SF, Bosseno MF, Telleria J, Bastrenta B, Yacsik N, Noireau F, Alcazar JL, Barnabé C, Wicker P, Tibayrenc M 998. Different behaviour of two Trypanosoma cruzi major clones: transmission and circulation in young bolivian patients. Exp Parasitol 89: Briones MRS, Souto RP, Stolf BS, Zingales B 999. The evolution of two Trypanosoma cruzi subgroups inferred from rrna genes can be correlated with the interchange of American mammalian faunas in the Cenozoic and has implications to pathogenicity and host specificity. Mol Biochem Parasitol (in press). Carreira JCA, Jansen AM, Deane MP, Lenzi HL 996. Histopathological study of experimental and natural infections by Trypanosoma cruzi in Didelphis marsupialis. Mem Inst Oswaldo Cruz 9: Clark CG, Pung OJ 994. Host specificity of ribosomal DNA variants in sylvatic Trypanosoma cruzi from North America. Mol Biochem Parasitol 66: Escalante AA, Ayala FJ 995. Evolutionary origin of Plasmodium and other apicomplexa based on rrna genes. Proc Natl Acad Sci 9: Fernandes O, Sturm NR, Derré R, Campbell DA 998a. The mini-exon gene: a genetic marker for zymodeme III of Trypanosoma cruzi. Mol Biochem Parasitol 95: Fernandes O, Souto RP, Castro JA, Pereira JB, Fernandes NC, Junqueira ACV, Naiff RD, Barret TV, Degrave W, Zingales B, Campbell DA, Coura JR 998b. Brazilian isolates of Trypanosoma cruzi from s and triatomines classified into two lineages using mini-exon and ribosomal RNA sequences. Am J Trop Med Hyg 58: Fernandes O, Santos SS, Junqueira ACV, Jansen AM, Cupolillo E, Campbell DA, Zingales B, Coura JR 999a. Population heterogeneity of Brazilian Trypanosoma cruzi isolates revealed by mini-exon and ribosomal spacers. Mem Inst Oswaldo Cruz this volume. Fernandes O, Mangia RH, Lisboa CV, Pinho AP, Morel CM, Zingales B, Campbell DA, Jansen AM 999b. The complexity of the sylvatic cycle of Trypanosoma cruzi in Rio de Janeiro state (Brazil) revealed by the non-transcribed spacer of the mini-exon gene. Parasitology 8: Floeter-Winter LM, Souto RP, Stolf BS, Zingales B, Buck GA 997. Can activity of the rrna gene promoter be used as a marker of speciation? Exp Parasitol 86: Garcia ES, Azambuja P 99. Development and interaction of Trypanosoma cruzi within the insect vector. Parasitol Today 7: Henriksson J, Aslund L, Macina RA, Franke de Cazzulo BM, Cazzulo JJ, Frasch ACC, Pettersson U 990. Chromosomal localization of seven cloned antigen genes provides evidence for diploidy and further demonstration of karyotype variability in Trypanosoma cruzi 990 Mol Biochem Parasitol 4: 3-4. Henriksson J, Pettersson U, Solari A 993. Trypanosoma cruzi: correlation between karyotype variability and isoenzyme classification. Exp Parasitol 77: Lana M, Silveira Pinto A, Barnabe C, Quesnay V, Noel S, Tibayrenc M 998. Trypanosoma cruzi: compared vectorial transmissibility of three major clonal genotypes by Triatoma infestans. Exp Parasitol 90: 0-5. Macedo AM, Pena, SDJ 998. Genetic variability of Trypanosoma cruzi: implications for the pathogenesis of Chagas disease. Parasitol Today 4: 9-4. Macedo AM, Martins MS, Chiari E, Pena, SDJ 99. DNA fingerprinting of Trypanosoma cruzi: a new tool for characterization of strains and clones. Mol Biochem Parasitol 55: Miles MA, Souza A, Povoa M, Shaw JJ, Lainson R, Toye PJ 978. Isozymic heterogeneity of Trypanosoma cruzi in the first autochtonous patients with Chagas disease in Amazonian Brazil. Nature 7: Miles MA, Lanham SM, De Souza AA, Póvoa M 980. Further enzymic characters of Trypanosoma cruzi and their evaluation for strain identification. Trans R Soc Trop Med and Hyg 74: -4. Morel C, Chiari E, Camargo E, Mattei D, Romanha A, Simpson L 980. Strains and clones of Trypanosoma cruzi can be characterized by restriction endonuclease fingerprint of kinetoplast DNA minicircles. Proc Natl Acad Sci USA 88: Nunes LR, Carvalho MRC, Shakarian AM, Buck GA 997a. The transcription promoter of the spliced leader gene from Trypanosoma cruzi. Gene 88:
6 64 T. cruzi Lineages Based on Ribosomal RNA Sequence Bianca Zingales et al. Nunes LR, Carvalho MRC, Buck GA 997b. Trypanosoma cruzi strains partition into two groups based on the structure and function of the spliced leader and rrna gene promoters. Mol Biochem Parasitol 86: -4. Oliveira RP, Broude NE, Macedo AM, Cantor CR, Smith CL, Pena SDJ 998. Probing the genetic population structure of Trypanosoma cruzi with polymorphic microsatellites. Proc Natl Acad Sci USA 95: Pung OJ, Spratt J, Clark CG, Norton TM, Carter J 998. Trypanosoma cruzi infection of free-ranging liontailed macaques (Macaca silenus) and ring-tailed lemurs (Lemur catta) on St. Catherine s Island, Georgia, USA. Zoo Wildl Med 9: Ruiz RC, Favoretto Jr S, Dorta ML, Oshiro MEM, Ferreira AT, Manque P, Yoshida N 998. Infectivity of Trypanosoma cruzi strains is associated with differential expression of surface glycoproteins with differential Ca + signaling activity. Biochem J 330: Sollner-Webb B, Tower J 986. Transcription of eukaryotic ribosomal RNA genes. Ann Ver Biochem 55: Souto RP, Zingales B 993. Sensitive detection and strain classification of Trypanosoma cruzi by amplification of a ribosomal RNA sequence. Mol Biochem Parasitol 6: Souto RP, Fernandes O, Macedo AM, Campbell DA, Zingales B 996. DNA markers define two major phylogenetic lineages of Trypanosoma cruzi. Mol Biochem Parasitol 83: 4-5. Stolf BS 999 Caracterização da Região Promotora do Cistron de RNA Ribossômico em Duas Linhagens Filogenéticas de Trypanosoma cruzi, MSc Thesis, Universidade de São Paulo, São Paulo. Stothard JR, Frame IA, Carrasco HJ, Miles MA 998. On the molecular taxonomy of Trypanosoma cruzi using riboprinting. Parasitology 7: Tibayrenc M 995. Population genetics of parasitic protozoa and other microorganisms. Adv in Parasitol 36: Tibayrenc M, Ayala F 988. Isoenzyme variability in Trypanosoma cruzi, the agent of Chagas disease: genetical, taxonomical and epidemiological significance. Evolution 4: Tyler-Cross RE, Short SL, Floeter-Winter LM, Buck GA 995. Transient expression mediated by the Trypanosoma cruzi rrna promoter. Mol Biochem Parasitol 7: 3-3. Yoshida N 983. Surface antigens of metacyclic trypomastigotes of Trypanosoma cruzi. Infect Immunity 40: Zingales B, Souto RP, Mangia RH, Lisboa CV, Campbell DA, Coura JR, Jansen A, Fernandes O 998. Molecular epidemiology of American trypanosomiasis in Brazil based on dimorphisms of rrna and miniexon gene sequences. Int J Parasitol 8: 05-. Note added in proof: during this Symposium it was recommended to adopt a common nomenclature to name the two principal groups of Trypanosoma cruzi strains TC and TC. In this direction, Lineage and Lineage referred in this paper correspond to groups TC and TC, respectively.
Variability of Kinetoplast DNA Gene Signatures of Trypanosoma cruzi II Strains from Patients with Different Clinical Forms of Chagas Disease in Brazil
JOURNAL OF CLINICAL MICROBIOLOGY, June 2006, p. 2167 2171 Vol. 44, No. 6 0095-1137/06/$08.00 0 doi:10.1128/jcm.02124-05 Copyright 2006, American Society for Microbiology. All Rights Reserved. Variability
More informationDepartamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de São Paulo, São Paulo, SP, Brasil
Haplotype distribution of five nuclear genes based on network genealogies and Bayesian inference indicates that Trypanosoma cruzi hybrid strains are polyphyletic L. Tomazi 1 *, S.Y. Kawashita 1 *, P.M.
More informationA new survey of the serology of human Trypanosoma cruzi infection in the Rio Negro microregion, Brazilian Amazon: a critical analysis
Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 108(7): 909-913, November 2013 909 A new survey of the serology of human Trypanosoma cruzi infection in the Rio Negro microregion, Brazilian Amazon: a critical
More informationTcI/TcII co-infection can enhance Trypanosoma cruzi growth in Rhodnius prolixus
Araújo et al. Parasites & Vectors 214, 7:94 SHORT REPORT Open Access TcI/TcII co-infection can enhance Trypanosoma cruzi growth in Rhodnius prolixus Catarina A C Araújo *, Peter J Waniek and Ana M Jansen
More informationTrypanosoma cruzi: ancestral genomes and population structure
108 Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 104(Suppl. I): 108-114, 2009 Trypanosoma cruzi: ancestral genomes and population structure Sérgio DJ Pena/ +, Carlos Renato Machado, Andréa Mara Macedo Departamento
More informationPrinciples of phylogenetic analysis
Principles of phylogenetic analysis Arne Holst-Jensen, NVI, Norway. Fusarium course, Ås, Norway, June 22 nd 2008 Distance based methods Compare C OTUs and characters X A + D = Pairwise: A and B; X characters
More informationCriteria of Chagas Disease Cure
Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 94, Suppl. I: 331-335, 1999 331 Criteria of Chagas Disease Cure J Romeu Cançado Cadeira de Terapêutica Clínica, Universidade Federal de Minas Gerais, Caixa Postal
More informationKey words: Trypanosoma cruzi, genetic diversity, biological diversity
Weak relation between genetic and biological diversity of natural populations of Trypanosoma cruzi Miriam Hitomi Andó 1, Marta Bértoli 1, Max Jean de Ornelas Toledo 2, Mônica Lúcia Gomes 2, Terezinha Aparecida
More informationPopulation Polymorphism of Trypanosoma cruzi in Latin America indicated by Proteome analysis and by in vitro amastigote proliferation
Tropical Medicine and Health Vol. 34 No. 4, 2006, pp. 167-174 Copyright 2006 by The Japanese Society of Tropical Medicine Population Polymorphism of Trypanosoma cruzi in Latin America indicated by Proteome
More informationMapping cancer, cardiovascular and malaria research in Brazil
Brazilian Journal of Medical and Biological Research (2) 33: 853-867 Mapping cancer, cardiovascular and malaria research ISSN 1-879X Overview 853 Mapping cancer, cardiovascular and malaria research in
More informationBiological behaviour of three strains of Trypanosoma cruzi from Yucatan, Mexico.
224 Rev Biomed 2001; 12:224-230. Biological behaviour of three strains of Trypanosoma cruzi from Yucatan, Mexico. Original Article Mario A. Barrera-Pérez, María E. Rodríguez-Félix, Eugenia Guzmán-Marín,
More informationInfestation of peridomestic Attalea phalerata palms by Rhodnius stali, a vector of Trypanosoma cruzi in the Alto Beni, Bolivia
Tropical Medicine and International Health doi:10.1111/j.1365-3156.2010.02527.x volume 15 no 6 pp 727 732 june 2010 Infestation of peridomestic Attalea phalerata palms by Rhodnius stali, a vector of Trypanosoma
More informationReceived 24 March 2003/Returned for modification 1 May 2003/Accepted 8 July 2003
CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY, Sept. 2003, p. 826 830 Vol. 10, No. 5 1071-412X/03/$08.00 0 DOI: 10.1128/CDLI.10.5.826 830.2003 Copyright 2003, American Society for Microbiology. All Rights
More informationHistopathological Study of Experimental and Natural Infections by Trypanosoma cruzi in Didelphis marsupialis
Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 91(5): 609-618, Sep./Oct. 1996 Histopathological Study of Experimental and Natural Infections by Trypanosoma cruzi in Didelphis marsupialis João Carlos Araujo
More informationTrypanosomiasis WRAIR- GEIS 'Operational Clinical Infectious Disease' Course
Trypanosomiasis WRAIR- GEIS 'Operational Clinical Infectious Disease' Course UNCLASSIFIED Disclaimer The views expressed in this presentation are those of the speaker and do not reflect the official policy
More informationThis article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and
This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution
More informationPhylogenetic Methods
Phylogenetic Methods Multiple Sequence lignment Pairwise distance matrix lustering algorithms: NJ, UPM - guide trees Phylogenetic trees Nucleotide vs. amino acid sequences for phylogenies ) Nucleotides:
More informationMolecular and Biochemical Parasitology, 16 (1985) Elsevier MBP 00580
Molecular and Biochemical Parasitology, 16 (1985) 315-327 315 Elsevier MBP 00580 IN VITRO DIFFERENTIATION OF TRYPANOSOMA CRUZI UNDER CHEMICALLY DEFINED CONDITIONS VICTOR T. CONTRERAS*, JUSSARA M. SALLES**,
More informationTrypanosoma cruzi in Persons without Serologic Evidence of Disease, Argentina
Trypanosoma cruzi in Persons without Serologic Evidence of Disease, Argentina Oscar A. Salomone,* Ana L. Basquiera,* Adela Sembaj, Ana M. Aguerri, María E. Reyes, Mirtha Omelianuk,* Ruth A. Fernández,
More informationTrypanosoma cruzi in the Anal Glands of Urban Opossums. I- Isolation and Experimental Infections
Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 91(4): 399-403, Jul./Aug. 1996 Trypanosoma cruzi in the Anal Glands of Urban Opossums. I- Isolation and Experimental Infections S Urdaneta-Morales +, I Nironi
More informationEvolution of influenza
Evolution of influenza Today: 1. Global health impact of flu - why should we care? 2. - what are the components of the virus and how do they change? 3. Where does influenza come from? - are there animal
More informationGenotype diversity of Trypanosoma cruzi in small rodents and Triatoma sanguisuga from a rural area in New Orleans, Louisiana
Herrera et al. Parasites & Vectors (2015) 8:123 DOI 10.1186/s13071-015-0730-8 RESEARCH Open Access Genotype diversity of Trypanosoma cruzi in small rodents and Triatoma sanguisuga from a rural area in
More informationKINETOPLASTIDS. Kinetoplast. Nucleus
KINETOPLASTIDS Kinetoplast Nucleus widespread parasites animals (fish humans) insects plants monophyletic group related to euglenoids unifying feature = kinetoplast Giemsa staining structure KINETOPLAST
More informationThe BLAST search on NCBI ( and GISAID
Supplemental materials and methods The BLAST search on NCBI (http:// www.ncbi.nlm.nih.gov) and GISAID (http://www.platform.gisaid.org) showed that hemagglutinin (HA) gene of North American H5N1, H5N2 and
More informationComparative transcriptome profiling of virulent and non-virulent Trypanosoma cruzi underlines the role of surface proteins during infection
RESEARCH ARTICLE Comparative transcriptome profiling of virulent and non-virulent Trypanosoma cruzi underlines the role of surface proteins during infection a1111111111 a1111111111 a1111111111 a1111111111
More informationNeglected Diseases (NDs) Landscape in Brazil and South America
Frontiers in Science on Neglected Diseases 13 th November 2014 Neglected Diseases (NDs) Landscape in Brazil and South America Jeffrey Shaw São Paulo University Biomedical Sciences Institute jeffreyj@usp.br
More informationABSTRACT. Contents available at PubMed Rev Inves Clin. 2016;68: BRIEF COMMUNICATION
REVISTA DE INVESTIGACIÓN CLÍNICA Contents available at PubMed www.clinicalandtranslationalinvestigation.com PERMANYER Rev Inves Clin. 2016;68:286-91 BRIEF COMMUNICATION The Type of Trypanosoma Cruzi Strain
More informationOVERVIEW OF CURRENT IDENTIFICATION SYSTEMS AND DATABASES
OVERVIEW OF CURRENT IDENTIFICATION SYSTEMS AND DATABASES EVERY STEP OF THE WAY 1 EVERY STEP OF THE WAY MICROBIAL IDENTIFICATION METHODS DNA RNA Genotypic Sequencing of ribosomal RNA regions of bacteria
More informationTrypanosoma cruzi Infection in Leontopithecus rosalia at the Reserva Biológica de Poço das Antas, Rio de Janeiro, Brazil
Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 95(4): 445-452, Jul./Aug. 2000 Trypanosoma cruzi Infection in Leontopithecus rosalia at the Reserva Biológica de Poço das Antas, Rio de Janeiro, Brazil Cristiane
More informationResponse to chemotherapy with benznidazole of clones isolated from the 21SF strain of Trypanosoma cruzi (biodeme Type II, Trypanosoma cruzi II)
ARTIGO/ARTICLE Revista da Sociedade Brasileira de Medicina Tropical 38(2):142-146, mar-abr, 25 Response to chemotherapy with benznidazole of clones isolated from the 21SF strain of Trypanosoma cruzi (biodeme
More informationWRAIR- GEIS 'Operational Clinical Infectious Disease' Course
Trypanosomiasis WRAIR- GEIS 'Operational Clinical Infectious Disease' Course The opinions or assertions contained herein are the private views of the author, and are not to be construed as official, or
More informationBlood Smears Only 6 October Sample Preparation and Quality Control 15B-K
NEW YORK STATE Parasitology Proficiency Testing Program Blood Smears Only 6 October 5 The purpose of the New York State Proficiency Testing Program in the category of Parasitology - Blood Smears Only is
More informationCourse Title Form Hours subject
Course Title Form Hours subject Types, and structure of chromosomes L 1 Histology Karyotyping and staining of human chromosomes L 2 Histology Chromosomal anomalies L 2 Histology Sex chromosomes L 1 Histology
More informationTrypanosoma cruzi Parasitemia in US Blood Donors with Serologic Evidence of Infection
BRIEF REPORT Trypanosoma cruzi Parasitemia in US Blood Donors with Serologic Evidence of Infection David A. Leiby, 1 Ross M. Herron, Jr., 2 George Garratty, 2 and Barbara L. Herwaldt 3 1 Transmissible
More informationVaccination with epimastigotes of different strains of Trypanosoma rangeli protects mice against Trypanosoma cruzi infection
370 Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 103(4): 370-374, June 2008 Vaccination with epimastigotes of different strains of Trypanosoma rangeli protects mice against Trypanosoma cruzi infection Beatriz
More informationVariations of the External Male Genitalia in Three Populations of Triatoma infestans Klug, 1834
Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 93(4): 479-483, Jul./Aug. 1998 Variations of the External Male Genitalia in Three Populations of Triatoma infestans Klug, 1834 Herton Helder Rocha Pires/ +,
More informationPMC ATM and ATR activities maintain replication fork integrity during SV40 chromatin replication. PLoS Pathog. 2013;9(4):e PMC
Class Date Instructors Topic Papers Scott Hensley and Jianxin You Vaccine Induced Antibodies that Neutralize Group 1 and Group 2 Influenza A Viruses. Cell. 2016 Jul 28;166(3):609 23. doi:10.1016/j.cell.2016.06.043.
More informationKinetoplastids Handout
Kinetoplastids Handout 1 Kinetoplastids widespread group of flagellated protozoa parasitize virtually all animal groups as well as plants and insects 3 distinct kinetoplastid species cause human disease
More informationKey words: malaria - Plasmodium vivax - merozoite antigens - IgG antibody response MATERIALS AND METHODS
Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 102(3): 335-339, June 2007 335 Comparative recognition by human IgG antibodies of recombinant proteins representing three asexual erythrocytic stage vaccine
More informationTo test the possible source of the HBV infection outside the study family, we searched the Genbank
Supplementary Discussion The source of hepatitis B virus infection To test the possible source of the HBV infection outside the study family, we searched the Genbank and HBV Database (http://hbvdb.ibcp.fr),
More information(ii) The effective population size may be lower than expected due to variability between individuals in infectiousness.
Supplementary methods Details of timepoints Caió sequences were derived from: HIV-2 gag (n = 86) 16 sequences from 1996, 10 from 2003, 45 from 2006, 13 from 2007 and two from 2008. HIV-2 env (n = 70) 21
More informationUsefulness of PCR-based assays to assess drug efficacy in Chagas disease chemotherapy: value and limitations
122 Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 104(Suppl. I): 122-135, 2009 Usefulness of PCR-based assays to assess drug efficacy in Chagas disease chemotherapy: value and limitations Constança Carvalho
More informationAn Evolutionary Story about HIV
An Evolutionary Story about HIV Charles Goodnight University of Vermont Based on Freeman and Herron Evolutionary Analysis The Aids Epidemic HIV has infected 60 million people. 1/3 have died so far Worst
More informationThe Application of Latent Class Analysis for Diagnostic Test Validation of Chronic Trypanosoma cruzi Infection in Blood Donors
BJID 2002; 6 (August) 181 The Application of Latent Class Analysis for Diagnostic Test Validation of Chronic Trypanosoma cruzi Infection in Blood Donors Dante M. Langhi Junior, José O. Bordin, Adauto Castelo,
More informationTrypanosoma cruzi strain TcI is associated with chronic Chagas disease in the Brazilian Amazon
Santana et al. Parasites & Vectors 2014, 7:267 RESEARCH Open Access Trypanosoma cruzi strain TcI is associated with chronic Chagas disease in the Brazilian Amazon Rosa Amélia Gonçalves Santana 1, Laylah
More informationPrevalence of Trypanosoma cruzi infection among Bolivian immigrants in the city of São Paulo, Brazil
70 Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 112(1): 70-74, January 2017 Prevalence of Trypanosoma cruzi infection among Bolivian immigrants in the city of São Paulo, Brazil Expedito JA Luna 1 / +, Celia
More informationTrypanosoma cruzi: Acute and long-term infection in the vertebrate host can modify the response to benznidazole
Available online at www.sciencedirect.com Experimental Parasitology 118 (28) 315 323 www.elsevier.com/locate/yexpr Trypanosoma cruzi: Acute and long-term infection in the vertebrate host can modify the
More information12 XXI Meeting of the SBPZ - MINI-CONFERENCES
MINI-CONFERENCES 11 12 XXI Meeting of the SBPZ - MINI-CONFERENCES [November, 2005-11-07-17h30 - ROOM A] MC01 - The epigenetic control of antigenic variation in Plasmodium falciparum SCHERF, Artur (Institut
More informationTrypanosoma cruzi: single cell live imaging inside infected tissues
1 Trypanosoma cruzi: single cell live imaging inside infected tissues Bianca Rodrigues Lima Ferreira 1, Cristina Mary Orikaza 1, Esteban Mauricio Cordero 1 and Renato Arruda Mortara 1, * 1. Departamento
More informationGenome differentiation, natural hybridisation and taxonomic relationships among Eleocharis viridans, E. niederleinii and E. ramboana (Cyperaceae)
, 2017, 30, 183 195 Supplementary material Genome differentiation, natural hybridisation and taxonomic relationships among Eleocharis viridans, E. niederleinii and E. ramboana (Cyperaceae) Carlos Roberto
More informationFig. 3. Second, third, and fourth stage nymphs (immatures) of Triatoma gerstaeckeri from Texas (LSAM).
The causative agent of Chagas disease, Trypanosoma cruzi, is a protozoan parasite that infects an estimated 24 million people in Central and South America. During 2006, the first indigenous case in Louisiana
More informationInfection, Genetics and Evolution
Infection, Genetics and Evolution 11 (2011) 44 51 Contents lists available at ScienceDirect Infection, Genetics and Evolution journal homepage: www.elsevier.com/locate/meegid Identification and lineage
More informationCLINICAL ANALYSIS AND PARASITE GENETIC DIVERSITY IN HUMAN IMMUNODEFICIENCY VIRUS/CHAGAS DISEASE COINFECTIONS IN BRAZIL
Am. J. Trop. Med. Hyg., 6(), 999, pp. 98 6 Copyright 999 by The American Society of Tropical Medicine and Hygiene CLINICAL ANALYSIS AND PARASITE GENETIC DIVERSITY IN HUMAN IMMUNODEFICIENCY VIRUS/CHAGAS
More informationZincum metallicum controls tissue inflammation in mice infected by Trypanosoma cruzi
Zincum metallicum controls tissue inflammation in mice infected by Trypanosoma cruzi Larissa Ciupa 1, Patricia Flora Sandri 2, Willian do Nascimento de Souza Rodrigues 3, Denise Lessa Aleixo 2, Leoni Vilano
More informationInfection, Genetics and Evolution
Infection, Genetics and Evolution 12 (2012) 240 253 Contents lists available at SciVerse ScienceDirect Infection, Genetics and Evolution journal homepage: www.elsevier.com/locate/meegid Review The revised
More informationTereza C Orlando, Mary Anne T Rubio*, Nancy R Sturm*, David A Campbell*, Lucile M Floeter-Winter/ +
Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 97(5): 695-701, July 2002 695 Intergenic and External Transcribed Spacers of Ribosomal RNA Genes in Lizard-infecting Leishmania: Molecular Structure and Phylogenetic
More informationCombined Use of Enzyme-Linked Immunosorbent Assay and Flow Cytometry To Detect Antibodies to Trypanosoma cruzi in Domestic Canines in Texas
CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY, Mar. 2004, p. 313 319 Vol. 11, No. 2 1071-412X/04/$08.00 0 DOI: 10.1128/CDLI.11.2.313 319.2004 Copyright 2004, American Society for Microbiology. All Rights
More informationInternational Journal of Environmental & Agriculture Research (IJOEAR) ISSN:[ ] [Vol-3, Issue-4, April- 2017]
Seroepidemiological Investigation for Chagas Disease in Two Municipalities of Goiás, Brazil David Antônio Costa Barros 1, Cleiciane Vieira de Lima Barros 2, Jônatas Barbosa Vasconcelos 3, Patrícia Abreu
More informationEmerging Acute Chagas Disease in Amazonian Brazil: Case Reports With Serious Cardiac Involvement
454 BJID 2004; 8 (December) Emerging Acute Chagas Disease in Amazonian Brazil: Case Reports With Serious Cardiac Involvement Ana Yecê das Neves Pinto 1,2, Parasitology Department of the Evandro Chagas
More informationIt is well known that some pathogenic microbes undergo
Colloquium Effects of passage history and sampling bias on phylogenetic reconstruction of human influenza A evolution Robin M. Bush, Catherine B. Smith, Nancy J. Cox, and Walter M. Fitch Department of
More informationDistribution of constitutive heterochromatin in species of triatomines with fragmentation of sex chromosomes X
Distribution of constitutive heterochromatin in species of triatomines with fragmentation of sex chromosomes X A.L. Guerra 1, K.C.C. Alevi 1, J.A. Rosa 2 and M.T.V. Azeredo-Oliveira 1 1 Laboratório de
More informationNOMENCLATURE & CLASSIFICATION OF PLANT VIRUSES. P.N. Sharma Department of Plant Pathology, CSK HPKV, Palampur (H.P.)
NOMENCLATURE & CLASSIFICATION OF PLANT VIRUSES P.N. Sharma Department of Plant Pathology, CSK HPKV, Palampur (H.P.) What is the purpose of classification? To make structural arrangement comprehension for
More informationChagas disease. (American trypanosomiasis)
Chagas disease (American trypanosomiasis) Epidemiology 7 to 8 million people worldwide are infected Endemic in Latin America and South America USA, Canada, Europe http://www.who.int/mediacentre/factsheets/fs340/en/index.html
More informationChagas Cardiomyopathy Manifestations and Trypanosoma cruzi Genotypes Circulating in Chronic Chagasic Patients
Chagas Cardiomyopathy Manifestations and Trypanosoma cruzi Genotypes Circulating in Chronic Chagasic Patients Juan David Ramírez 1, Felipe Guhl 1 *, Lina María Rendón 1, Fernando Rosas 2, Jose A. Marin-Neto
More informationName: Due on Wensday, December 7th Bioinformatics Take Home Exam #9 Pick one most correct answer, unless stated otherwise!
Name: Due on Wensday, December 7th Bioinformatics Take Home Exam #9 Pick one most correct answer, unless stated otherwise! 1. What process brought 2 divergent chlorophylls into the ancestor of the cyanobacteria,
More informationLeishmania (Viannia) naiffi: rare enough to be neglected?
Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 0(): 9-800, September 05 9 Leishmania (Viannia) naiffi: rare enough to be neglected? Giselle Aparecida Fagundes-Silva, Gustavo Adolfo Sierra Romero, Elisa Cupolillo
More informationISOTHERMAL AMPLIFICATION IN MOLECULAR DIAGNOSIS OF SLEEPING SICKNESS
Molecular Diagnostics Symposium 2014 Zurich, 27 February 2014 ISOTHERMAL AMPLIFICATION IN MOLECULAR DIAGNOSIS OF SLEEPING SICKNESS Stijn Deborggraeve Parasite Diagnostics Unit, Institute of Tropical Medicine
More informationThe use of nonhuman primates in biomedical research has led to the isolation of many
JVI Accepts, published online ahead of print on 29 September 2010 J. Virol. doi:10.1128/jvi.01928-10 Copyright 2010, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights
More informationPotential overestimation of HIV-1 sub-subtype F1 circulation in Rio de Janeiro, Brazil
SHORT COMMUNICATION Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 113(8): e170483, 2018 1 6 Potential overestimation of HIV-1 sub-subtype F1 circulation in Rio de Janeiro, Brazil Bianca Cristina Leires Marques,
More informationBayBoots: a model-free Bayesian tool to identify class markers from gene expression data
R.Z.N. Vêncio et al. 138 BayBoots: a model-free Bayesian tool to identify class markers from gene expression data Ricardo Z.N. Vêncio 1,2, Diogo F.C. Patrão 3, Cassio S. Baptista 4, Carlos A.B. Pereira
More informationCharlotte L. Kerr 1, Tapan Bhattacharyya 1*, Samanta C. C. Xavier 2, Juliana H. Barros 2, Valdirene S. Lima 2, Ana M. Jansen 2 and Michael A.
Kerr et al. Parasites & Vectors (2016) 9:584 DOI 10.1186/s13071-016-1873-y RESEARCH Open Access Lineage-specific serology confirms Brazilian Atlantic forest lion tamarins, Leontopithecus chrysomelas and
More informationAction of Trypanosoma rangeli in Infections with Virulent Trypanosoma cruzi Populations
Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 98(4): 543-548, June 2003 543 Action of Trypanosoma rangeli in Infections with Virulent Trypanosoma cruzi Populations MT Paláu*/ +, AJ Mejía*, U Vergara**/***,
More informationITS accuracy at GenBank. Conrad Schoch Barbara Robbertse
ITS accuracy at GenBank Conrad Schoch Barbara Robbertse Improving accuracy Barcode tag in GenBank Barcode submission tool Standards RefSeq Targeted Loci Well validated sequences already in GenBank Bacteria
More informationEvaluation of Three Commercial Enzyme-Linked Immunosorbent Assays for Diagnosis of Chagas Disease
JOURNAL OF CLINICAL MICROBIOLOGY, Sept. 1998, p. 2423 2427 Vol. 36, No. 9 0095-1137/98/$04.00 0 Copyright 1998, American Society for Microbiology. All Rights Reserved. Evaluation of Three Commercial Enzyme-Linked
More informationRajesh Kannangai Phone: ; Fax: ; *Corresponding author
Amino acid sequence divergence of Tat protein (exon1) of subtype B and C HIV-1 strains: Does it have implications for vaccine development? Abraham Joseph Kandathil 1, Rajesh Kannangai 1, *, Oriapadickal
More informationProtozoa from tissues. Leishmania spp. Naegleria fowleri Toxoplasma gondii Trichomonas vaginalis Trypanosoma spp.
Protozoa from tissues Leishmania spp. Naegleria fowleri Toxoplasma gondii Trichomonas vaginalis Trypanosoma spp. Leishmaniasis Leishmania infantum, Leishmania donovani, in macrophages of man. Female sandflies:
More informationChronic HIV-1 Infection Frequently Fails to Protect against Superinfection
Chronic HIV-1 Infection Frequently Fails to Protect against Superinfection Anne Piantadosi 1,2[, Bhavna Chohan 1,2[, Vrasha Chohan 3, R. Scott McClelland 3,4,5, Julie Overbaugh 1,2* 1 Division of Human
More informationAcute chagas outbreaks: molecular and biological features of Trypanosoma cruzi isolates, and clinical aspects of acute cases in Santander, Colombia
Díaz et al. Parasites & Vectors (2015) 8:608 DOI 10.1186/s13071-015-1218-2 RESEARCH Open Access Acute chagas outbreaks: molecular and biological features of Trypanosoma cruzi isolates, and clinical aspects
More informationParasitic Protozoa, Helminths, and Arthropod Vectors
PowerPoint Lecture Slides for MICROBIOLOGY ROBERT W. BAUMAN Chapter 23 Parasitic Protozoa, Helminths, and Arthropod Vectors Parasitic Diseases Protozoan and helminthic parasites are emerging as serious
More informationBlood Smears Only 19 May Sample Preparation and Quality Control
NEW YORK STATE Parasitology Proficiency Testing Program Blood Smears Only 9 May 205 The purpose of the New York State Proficiency Testing Program in the category of Parasitology - Blood Smears Only is
More informationSUPPLEMENTAL INFORMATION
SUPPLEMENTAL INFORMATION GO term analysis of differentially methylated SUMIs. GO term analysis of the 458 SUMIs with the largest differential methylation between human and chimp shows that they are more
More informationEPIDEMIOLOGICAL HETEROGENEITY OF INFECTIONS WITH HEPATITIS B AND D VIRUSES IN BRAZIL
PREVENTION AND CONTROL OF VIRAL HEPATITIS IN BRASILAND OTHER LATIN AMERICAN COUNTRIES BRASÍLIA, BRAZIL 21 DE MARCH 2014 EPIDEMIOLOGICAL HETEROGENEITY OF INFECTIONS WITH HEPATITIS B AND D VIRUSES IN BRAZIL
More informationIntegrative Biology 200A PRINCIPLES OF PHYLOGENETICS Spring 2012
Integrative Biology 200A PRINCIPLES OF PHYLOGENETICS Spring 2012 University of California, Berkeley Kipling Will- 1 March Data/Hypothesis Exploration and Support Measures I. Overview. -- Many would agree
More informationMalaria Control in an Agro-industrial Settlement of Rondônia (Western Amazon Region, Brazil)
Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 95(2): 139-145, Mar./Apr. 2000 Malaria Control in an Agro-industrial Settlement of Rondônia (Western Amazon Region, Brazil) Juan Miguel Villalobos Salcedo/ +,
More informationMultiple sequence alignment
Multiple sequence alignment Bas. Dutilh Systems Biology: Bioinformatic Data Analysis Utrecht University, February 18 th 2016 Protein alignments We have seen how to create a pairwise alignment of two sequences
More informationChagas disease: Challenges in Diagnostics
Chagas disease: Challenges in Diagnostics Emily Adams Royal Tropical Institute (KIT), KIT Biomedical Research The Netherlands e-mail: e.adams@kit.nl Aims of KIT Biomedical Research To contribute to the
More informationDETECTION AND SIGNIFICANCE OF INAPPARENT INFECTION IN CHAGAS DISEASE IN WESTERN VENEZUELA
Am. J. Trop. Med. Hyg., 5(), 2, pp. 2222 Copyright 2 by The American Society of Tropical Medicine and Hygiene DETECTION AND SIGNIFICANCE OF INAPPARENT INFECTION IN CHAGAS DISEASE IN WESTERN VENEZUELA NESTOR
More informationاعداد رغداحمد رغد جمال الدين
اعداد رغداحمد رغد جمال الدين Trypanosoma Causes Trypanosomiasis West African Trypanosomiasis T.brucei gambiense Sleeping sickness East African Trypanosomiasis T.brucei rhodesiense American Trypanosomiasis
More information2004 The Japan Mendel Society Cytologia 69(2): , 2004
2004 The Japan Mendel Society Cytologia 69(2): 175 179, 2004 Chromosome Localization of the Ribosomal Genes 18S and 5S in Four Stocks of Rainbow Trout (Oncorhynchus mykiss) from Cultivated and Naturalized
More informationaP. Code assigned: Short title: Remove (abolish) the species Narcissus symptomless virus in the genus Carlavirus, family Betaflexiviridae
This form should be used for all taxonomic proposals. Please complete all those modules that are applicable (and then delete the unwanted sections). For guidance, see the notes written in blue and the
More informationInter-country mixing in HIV transmission clusters: A pan-european phylodynamic study
Inter-country mixing in HIV transmission clusters: A pan-european phylodynamic study Prabhav Kalaghatgi Max Planck Institute for Informatics March 20th 2013 HIV epidemic (2009) Prabhav Kalaghatgi 2/18
More informationHospedeiro Invertebrado (Patrícia Azambuja; Eloi S. Garcia) Estudo por microscopia eletrônica de transmissão (Wanderley de Souza)
CICLO EVOLUTIVO Hospedeiro Invertebrado (Patrícia Azambuja; Eloi S. Garcia) Hospedeiro vertebrado (Wanderley de Souza) Cultura de Células (Técia Ulisses de Carvalho) Meio axênico (Wanderley de Souza) TAXONOMIA
More informationBioinformation by Biomedical Informatics Publishing Group
Predicted RNA secondary structures for the conserved regions in dengue virus Pallavi Somvanshi*, Prahlad Kishore Seth Bioinformatics Centre, Biotech Park, Sector G, Jankipuram, Lucknow 226021, Uttar Pradesh,
More informationElimination of Chagas disease transmission: perspectives
Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 104(Suppl. I): 41-45, 2009 41 Elimination of Chagas disease transmission: perspectives João Carlos Pinto Dias Instituto René Rachou-Fiocruz, Av. Augusto de Lima,
More informationcumenhire Isoenzyme Profiles of Trypanosoma cruz; Stocks from Different Areas of Paraguay
Mem lnst Oswaldo Cruz, Rio de janeiro, Vol. 96(4): 57-5, May 00 57 soenzyme Profiles of Trypanosoma cruz; Stocks from Different Areas of Paraguay Nidia Acosta, Margarita Samudio, flsa López, Fernando Vargas",
More informationNew genomic typing method MLST
New genomic typing method MLST Bon KIMURA fingerprinting PFGE DNA multilocus sequence typingmlst alleles PFGE MLST 1990 PCR 1 PCR DNA PFGE 1 PFGE RAPDrandomly amplified polymorphic DNA 3 AFLPAmplified
More informationMechanisms of Evolution. Macroevolution. Speciation. MICROEVOLUTION - A change in the frequency of alleles. Review population genetics Ch. 23.
Mechanisms of Evolution Macroevolution Speciation MICROEVOLUTION - A change in the frequency of alleles. Review population genetics Ch. 23. MACROEVOLUTION - Speciation (or emergence of higher taxonomic
More informationRandom Amplification of Polymorphic DNA Reveals Serotype- Specific Clonal Clusters among Enterotoxigenic Escherichia coli Strains Isolated from Humans
JOURNAL OF CLINICAL MICROBIOLOGY, June 1997, p. 1521 1525 Vol. 35, No. 6 0095-1137/97/$04.00 0 Copyright 1997, American Society for Microbiology Random Amplification of Polymorphic DNA Reveals Serotype-
More informationUsing Phylogenetic Structure to Assess the Evolutionary Ecology of Microbiota! TJS! iseem Call! April 2015!
Using Phylogenetic Structure to Assess the Evolutionary Ecology of Microbiota! TJS! iseem Call! April 2015! How are Microbes Distributed In Nature?! A major question in microbial ecology! Used to assess
More informationNucleoside triphosphate diphosphohydrolase1 (TcNTPDase-1) gene expression is increased due to heat shock and in infective forms of Trypanosoma cruzi
Silva-Gomes et al. Parasites & Vectors 2014, 7:463 SHORT REPORT Open Access Nucleoside triphosphate diphosphohydrolase1 (TcNTPDase-1) gene expression is increased due to heat shock and in infective forms
More information